$ git clone -n https://src.fedoraproject.org/rpms/mussh.git /var/lib/mock/f40-build-2012217-45777/root/chroot_tmpdir/scmroot/mussh
Cloning into '/var/lib/mock/f40-build-2012217-45777/root/chroot_tmpdir/scmroot/mussh'...
$ git fetch origin e46e4d8353c00e8434b618e09fce4b7d6ca631a1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mussh
 * [new ref]         e46e4d8353c00e8434b618e09fce4b7d6ca631a1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e46e4d8 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild